you can't compare ethereum over bitcoin they have different functions this has been the debate over the years, at the same time like everyone said no one is bigger than bitcoin, it's been years where altcoins are trying to overtake bitcoin, they are always second place.
I agree. They are different coin and no altcoin can bypass the value of bitcoin. Sometimes price varies each other and there is that fluctuates depends on the other. Years passed and getting the highest value from bitcoin is a dream the reason why, always believe investing on bitcoin. This wont lose the value.